British Grand Prix: Lewis Hamilton Tops Friday Practice Times

Lewis Hamilton may have finished top of the timesheet in practice for Sunday's British Grand Prix but the home hero was left to ponder the latest failure to his Mercedes.

Two retirements this season - in the opening race in Australia and again in Canada last month - have cost Hamilton dear in his clash for the Formula One world title with team-mate Nico Rosberg.

Lewis Hamilton finished 0.228s ahead of team-mate Nico Rosberg

The 29-year-old heads into his home race 29 points adrift of Rosberg and in dire need of a result to quell the German's forward momentum after a run of three grands prix in which he has heavily outscored the Briton.

But at a time when Hamilton was beginning to flex his muscles around Silverstone by posting the fastest lap on the quicker of Pirelli's two tyre compounds for this weekend - the medium - his car ground to a halt with 30 of the 90 minutes remaining.

The collective groan from the majority of the 70,000-strong crowd at the Northamptonshire venue was a deep one as Hamilton clambered out of the cockpit of a car that had stopped between turns three and four - The Loop and Aintree respectively.

It was proof again Mercedes are far from bulletproof in a season they have so far dominated, although Hamilton must be wondering 'why me?' as Rosberg has avoided such issues.

The 29-year-old has so far finished in the top two in all eight races to eke out his margin over Hamilton, although he did suffer the same loss of ERS (energy recovery system) in Montreal.

As the first woman in 22 years to take part in an F1 weekend, and only the sixth overall, Wolff's day in the spotlight resulted in the Scot managing one timed lap before pulling off track.

As for team-mate Felipe Massa, the Brazilian spun off at Stowe and crashed heavily into a barrier, only for his team to perform wonders by getting him back on track for FP2, at the end of which he finished 11th, just over two seconds back.

McLaren's Jenson Button and Kevin Magnussen were seventh and eight best respectively, both 1.7secs down, with Marussia's Max Chilton in 21st and 4.7secs in arrears.